ETvalley Univeral LCD Display Bluetooth Wireless Car MP3 FM Transmitter Modulator Radio Adapter Handsfree Car Kit One button for answer and hung up, easy operation and convenient to use. ETvalley FM transmitter can avoid the potential safety hazard of answer calls during driving. No need any equipment in the car, you can easily pair the Bluetooth mobile phone and adjust the frequency of music. Play music of phone, external USB flash disk and SD card; Support the MP3/WMA music format Use the DSP (digital signal processing) echo cancellation technology and noise suppression (CVC) technology to create an excellent voice quality Support two cell phone connection Bluetooth, the power supply after opening, automatic back to even, automatic into the matching condition. Directly powered by the car cigarette lighter, no need the external power supply. Can charge for various smart phones